According to the University of Florida, the Chinese elm is a deciduous tree. Chinese elm, also known as Drake elms or lacebark elms are ornamental trees that are native to North China, Japan and Korea. It was popular to plant trees in urban areas, because they are against Dutch elm disease and air pollution. However, they have aggressive roots, and the USDA Forest Service keeps an invasive weed in some states, including North Carolina, New Jersey, Virginia, Wisconsin and Nebraska.
Chinese Elms are deciduous trees with glossy, dark green leaves, orange, red, purple and gold again in the fall. The tree bark peels an attractive pattern gray, green, orange, brown and red-brown reveal. Chinese elms have a moderate-to-fast growth rate and can reach a height of 50 meters. Although it is classified as a deciduous tree, it can almost always green when growing in mild climates.
Chinese elms are to landscape parking lot islands, median strip used in highway and residential streets. They also make good shade trees and windbreaks. Chinese elm are grown as bonsai, and after the Kansas Forest Service, the tree is a good wood species that produces a moderate amount of heat.
Chinese elm is resistant to Dutch elm disease and elm yellow. However, it is susceptible to anthracnose, powdery mildew and hull crabs. Anthracnose can be identified by small yellow spots on the upper surface of the leaves. If the disease progresses, the points spread and whole leaves are blighted and fall from the tree. Remove leaves before winter and use preventive fungicides in the spring. Powdery mildew appears as a gray-white powder, which causes the leaves covered and that they turn yellow and drop. Prune diseased leaves and avoid overhead irrigation. Trunk cancers form when the trees are injured. Remove diseased and dead branches and avoid injury to the bark.
Chinese elms are susceptible to a number of bugs, including the elm borer attack, branch of dogwood borer and elm leaf beetle. Borers leave small holes and sawdust in the branches or trunk. The elm leaf beetle feeds on the leaves, skeletonization them. Insecticides to help control beetles because natural enemies are generally not sufficient to reduce their number. Microscopic worm-like insects called eriophyid mites can attack Chinese elms. Symptoms of the infection are distorted leaves. Prune infected branches and help use dormant oils or miticides to control pests. Several types of scale can also be a problem. Look for bumps on the branches and use stifle oil mist to control them.